Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
14 Cards in this Set
- Front
- Back
Large collections of planets, gas, dust, and millions or billions of stars, bound together by gravity. |
Galaxies |
|
Units of distance in astronemy equal to the distance that light travels in one year. |
Light-Years |
|
A measure of the amount of radiating or refleted light coming off a star or other celestial object; brightness |
Luminosity |
|
A region or cloud of interstellar dust and gas appearing as a bright or dark patch. |
Nubula |
|
To revolve around another object. |
Orbit |
|
A star and the celestial bodies that revolve around it; a planitary system. |
Solar System |
|
Bodies in outer space, made of hot gases, that shine in the night sky. |
Stars |
|
The death explosion of a massive star, resulting in a sharp increase in brightness followed by a gradual fading. |
Supernova |
|
Instruments used to make distant objects look closer. |
Telescopes |
|
Scientists who study planets. |
Astonimers |
|
A theory that suggests that the universe began from a single, enourmus explosion. |
Big Bang Theory |
|
A region of space within a gravitational field so intense that nothing can escape it. |
Black Hole |
|
A close group. |
Cluster |
|
Scientists who study the organ and structure of the universe. |
Cosmologists |